/*
 * Copyright 2010-2020 Alfresco Software, Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.engine.test.regression;

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import org.activiti.bpmn.model.BpmnModel;
import org.activiti.bpmn.model.Error;
import org.activiti.bpmn.model.FlowElement;
import org.activiti.bpmn.model.Process;
import org.activiti.bpmn.model.ServiceTask;
import org.activiti.validation.ProcessValidator;
import org.activiti.validation.ValidationError;
import org.activiti.validation.validator.ValidatorSet;

/**
 * Sample Process Validator for Activiti Test case.
 */
public class ActivitiTestCaseProcessValidator implements ProcessValidator {

    @Override
    public List<ValidationError> validate(BpmnModel bpmnModel) {
        CustomParseValidator customParseValidator = new CustomParseValidator();

        for (Process process : bpmnModel.getProcesses()) {
            customParseValidator.executeParse(bpmnModel, process);
        }
        return bpmnModel
            .getErrors()
            .values()
            .stream()
            .map(bpmnError -> {
                ValidationError error = new ValidationError();
                error.setValidatorSetName("Manual BPMN parse validator");
                error.setProblem(bpmnError.getId());
                error.setActivityId(bpmnError.getId());
                return error;
            })
            .collect(Collectors.toList());
    }

    @Override
    public List<ValidatorSet> getValidatorSets() {
        return null;
    }

    class CustomParseValidator {

        protected void executeParse(BpmnModel bpmnModel, Process element) {
            for (FlowElement flowElement : element.getFlowElements()) {
                if (!ServiceTask.class.isAssignableFrom(flowElement.getClass())) {
                    continue;
                }
                ServiceTask serviceTask = (ServiceTask) flowElement;
                validateAsyncAttribute(serviceTask, bpmnModel, flowElement);
            }
        }

        void validateAsyncAttribute(ServiceTask serviceTask, BpmnModel bpmnModel, FlowElement flowElement) {
            if (!serviceTask.isAsynchronous()) {
                bpmnModel.addError(
                    "Please set value of 'activiti:async'" + "attribute as true for task:" + serviceTask.getName(),
                    "error-" + serviceTask.getName(),
                    flowElement.getId()
                );
            }
        }
    }
}
